Blazar Celestial Band Radiation Flow Analysis Using The Discrete Correlation Function Method

Active galactic nuclei (AGN) are very active researching-fields in astrophysics in recent years. They are related to the most fundamental problems in astrophysics. The research of Active galactic nuclei is very important in many fundamental problems, such as producing-energy, radiation mechanisms and theory of the universe. Therefore, many people devote themselves to the theoretical and observational studies in this field. Active galactic nuclei are rare objects in radiation from radio to y-ray at the same time. Multi-band observation is the foundation of the full understanding of which structure, understanding of which the physical process and the relation of sub-objects. Blazar is radio-loud active galactic nuclei. They are subset of AGN and are characterized by the rapid variability of light, strong and variable linear polarization and in any observed energy band. They are core-dominated, flat spectrum radio sources. The timescale of them is shortest in all AGN and the amplitude of variability of light is the biggest.In this thesis, the properties and radiation mechanisms of active galactic nuclei (AGN) were reviewed. Then I introduced the Discrete Correlation Function (DCF) simply. And at the end, we collected 119 y -ray-loud Blazar(97 flat spectrum radio quasars (FSRQs) and 22 BL Lacertae objects (BL Lac)), and investigate respectively the correlation between the y-ray emission (maximum, minimum, and average data) at 1GeV and the radio emission at 8.4 GHz by discrete correlation function (DCF) method. Our result shows that the y-rays are associated with the radio mission from the jet, and that the y-ray emission is likely to have come from the synchrotron self-Compton model (SSC) process in this case. And then I analysis the multi-wave bands correlation of 156 Blazar using the...